package com.example.chainsave.common.interceptor;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.example.chainsave.common.model.Result;
import com.example.chainsave.common.util.CookieUtil;
import com.example.chainsave.common.util.HostHolder;
import com.example.chainsave.upload.entity.LoginTicket;
import com.example.chainsave.upload.entity.User;
import com.example.chainsave.upload.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

@Component
public class LoginTicketInterceptor implements HandlerInterceptor {
    @Autowired
    private UserService userService;
    @Autowired
    private HostHolder hostHolder;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //从Cookie中获取凭证
        String ticket = CookieUtil.getCookieValue(request, "ticket");
        if (ticket != null) {
            //查询凭证
            LoginTicket loginTicket = userService.findLoginTicket(ticket);
            //检查凭证是否有效
            if (loginTicket != null && loginTicket.getStatus() == 0 && loginTicket.getExpired().after(new Date())) {
                //根据凭证查询用户
                User user = userService.findUserById(loginTicket.getUserId());
                //在本次请求中持有用户
                hostHolder.setUser(user);
            } else {
                response.setCharacterEncoding("utf-8");
                response.getWriter().print(JSON.toJSONString(new Result<String>().setNotLoginErrorMsgInfo("登录超时"), SerializerFeature.WriteMapNullValue));
                return false;
            }

        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//        User user = hostHolder.getUser();
//        hostHolder.clear();
//        if (user != null && modelAndView != null) {
//            modelAndView.addObject("loginUser", user);
//        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        hostHolder.clear();
    }
}
